Hose coupling



April 21, .1936.

' HOSE CQUPLING original Filed May 4,.;'929

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Patented Apr.l 21,' 1936 nosav coUPLING I Joseph R. Heidloil, South Bend, Ind., assigner to n Hydraulic Brake Company, Detroit, Mich., a

lcorporation oi' Calii' original application May 4, 1929,1se1nm1 No. 360,360, now Patent N0. 1,886,807, dated November 8, 1932. Divided and this application June 2 7, 1932, `sel-iai No. 619,368- x 1 claim. (ci. 28s- 84) My invention relates tov hose couplings particu# larly adapted for high pressure hose. j l

The couplings 'for high pressure hose, such as used in hydraulic brake systems, must'be rmly and securely attached to the hose in order to prevent the high pressure in the hose from separating the coupling and the hose. Such'hose fromrelative movement between the vehicle frame and the wheels.

An object of my invention is to provide a novel coupling which is especially designed to meets these conditions ot service.

Referring to the drawing, Fig. 1 is a sectional view of my new-and improved thimble and assembly apparatus therefor; and

ll'lg. 2 is anenlarged sectional -view of the thimble shown in Fig. 1.

[In the drawing I have shown my new and improved thimble' as applied to a hose II which is oi' the high pressure type, such as used in hydraulicbraking systems. A sleeve I2 is placed .over one end of the hose and has a cylindrical portion provided with threads I3 for connecting the sleeve to a companion member of a motor vehicle or the like. 'I'he lower end Il of the sleeve I2 is flared radially outward and is preferably provided with a hexagonal periphery to tacilitate threading the sleeve into another member. 'Ihe sleeve is provided with an internal bore of a slightly smaller diameter than the hose to .cause a slight compression of the hose when it is inserted in the sleeve, sc that upon'the subsequent expansion of the hose by a thimble or nipple I5 which is inserted therein, the hose will not be expanded beyond its mean diameter.-

The interior of the sleeve I2 is provided with a portion I8 oi' a smaller diameter than the remaining portion of the sleeve, thereby providing an enlarged portion I6 adjacent the end of the hose which is compressed to a lesser degree than the intermediate portion, resulting in a strong interlocking connection between the hose and the sleeve. The end of the -sleeve is provided with an axially extending iiange I1 formed by enlarging the bore of the sleeve adjacent the end.

The thimble I5 which is adapted to be inserted in the hose and expanded therein and interlocked with the sleeve, comprises a cylindrical portion I8 The periphery of th disk-shaped portion I 9 is slightly beveledso that when seated upon the shoulder within the sleeve flange I1 of the sleeve may be crimped inwardly'to forml an interlock between thev sleeve and the thimble.

In assembling the coupling upon `the end of i thehose, the hose is rst manually insertedwithin thesleeve andthe end of the' thimblei's placed within the bore of the hose. The sleeve and hose are then placed upon-an anvil 2| having a slot 22 therein permitting the hose to be laterally inserted within the slot in such a position that the head of the sleeve will rest upon the anvil.

The apparatus for assembling the coupling comprises a press head 23 carrying a plunger 2l. 'I'he lower end 25 of the plunger\ is cone-shaped and serves to expand the cylindrical portion I8 of the thimble to compress the hose against the inner wall or the sleeye.

Rearwardly of the cone-shaped portion the head of the plunger is provided with a short cylindrical portion 26. The plunger 24 has a ta.- pering portion 21 which terminates in a cylindrical portion '28 of slightly greater diameter .than the head of the plunger for a purpose to be described later.

Intermediate the cylindrical portions 26 and 28 the plunger is of a reduceddiameter to avoid unnecessary friction in the expansion oi' the 33 is provided with a cooperating shoulder 35 for thimble. Surrounding the plunger 24 is a reciplimiting the relative movement between the block and the sleeve.

The lower end of the sleeve is provided with -a beveled inner periphery 20 for crimping the ange I1 against the beveled edge of the thimble when the head 23 of the press strikes the upper end of the sleeve.

When the hose and'sleeve have been placed upon the anvil, as described above, and the thimble I5 has been started into the hose, the press head is moved downwardly, forcing the. thimble into the hose. Upon a further downward movement 'of the press head, spring 32, acting through .block 3|, will cause the disk I 9 of the thimble to be seated within the flange I1 of the sleeve. AA still further -downward movement of the press-head will. cause the plunger head 25 to enter the bore of the thimble and expand the thimble to compress'the hose against 'the inner wall of the sleeve. Just as the head oi' the plunger has passed through the entire thimble and expanded it, the enlarged portion 28 of the 55 A head.

enlarge this portion, as indicated at l2' (Fig. 2), so as to permit the ready removal o! the plunger When the plunger head has passed through the thimble and the enlarged portion 28 o! the' plunger is within the end of the thimble, the

press head 23` strikes the upper end, of sleeve if and causes the beveled inner periphery of the lower end of the sleeve to crimp the ilange l1 inwardly to securely interlock the sleeve with..

the thimble, as clearly shown, thus completing the assembling operation. It will be noted that at this time spring 32 is considerably compressed so that upon the raising of the press head` 22 and the withdrawal of the plunger from the coupling, the spring will exert sumcient pressure upon block 3l to retain the coupling upon the anvil and allow the plunger to be withdrawn from the completed coupling. l

This application is a division of my capending application, Serial No. 360,360, med May 4,

19u29, now Patent 1,886,807,01 November 8, 1932. While I have described only one embodiment oi' my invention, it is to be understood that my invention is capable of assuming various forms, and that the scope of my invention is to be limited solelyl by the following claim.

I claim: u In a completelyassembled coupling of the class described, incombination, a hose, a sleeve surrounding one end of said hose, said sleeve having adjacent portionsv of different internal diameters, forming a shoulder portion, a thimble interlocked with said sleeve, extending into the bore of said hose to a point beyond saidv shoulder, .and expanded to two diameters, the portion of, larger diameter lying adjacent the end of said hose and extending into the hose to a point short o! said shoulder portion of the sleeve, the hose being subjected to a maximum compressive force over a portion thereof disposed between the ends o! said thimble.

4 JOSEPH R. HEIDIDI'T. 

